Oh boy! Joker can't help but laugh at that, because it's a little bit funny, which is good since he'd needed that. This place doesn't really lend itself well to cheer and the like. Laughter is a good measure for how screwed they all are.

"Then we clearly have pretty similar taste! Maybe I should ask ya for date ideas~." If they ever manage to get out of here for that to be relevant, but, hey.